ABS material, non-toxic, safe to use, sealed design, professionalFill the aquarium with water from one container to another with a hand pump The headboard (integrated gravel/fish strainer) is specially designed for gravel cleaning. You can dig it directly into the gravel. Clean the gravel bed in a small reef and aquatic aquarium, and change the water regularly. The small vacuum suction cup makes it easy to clean the circle and under the stone, wood and coral. The aquarium water changer is a practical tool that can clean the aquarium quickly and easily. Very suitable for water change and gravel cleaning. The on/off flow control faucet design is simple and convenient to use. The small container self-absorption transmission design can speed up the operation speed (such as sucking diesel oil from the car, etc.)